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NUMBER.MAC
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NUMBER.MAC
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;
; NUMBER.MAC - Numeric Conversion
;
; 97/12/28
;
; DECIMAL HEX digit CONVERT (number?) NUMBER? HOLD <# #> SIGN
; # #S
;
; DECIMAL ( -- ) 10 base !
hdr 7,'DECIMAL'
dec: call docol
dw clit
db 10
dw base,store
dw exit
; HEX ( -- ) 16 base !
hdr 3,'HEX'
hex: call docol
dw clit
db 16
dw base,store
dw exit
; digit ( char base -- u -1 | 0 )
hdr 0,'DIGIT'
digit: pop hl
pop de
ld a,e
call upc ; make uppercase
sub '0'
jp m,false
cp 10
jp m,digit1
sub 7
cp 10
jp m,false
digit1: cp l
jp p,false
ld e,a
push de
jp true
; CONVERT ( d1 addr1 -- d2 addr2 ) begin 1+ dup >r c@ base @ digit
; while swap base @ um* drop rot base
; @ um* d+ r> repeat r>
hdr 7,'CONVERT'
conv: call docol
conv1: dw onep
dw dup,tor
dw cat
dw base,at
dw digit
dw zbran,conv2
dw swap
dw base,at
dw umstr,drop
dw rot
dw base,at
dw umstr
dw dplus
dw fromr
dw bran,conv1
conv2: dw fromr
dw exit
; (number?) ( addr -- d -1 | 0 ) 0 0 rot dup 1+ c@ [char] - = dup >r -
; convert dup c@ [char] . = dup not dpl
; ! - c@ bl - if r> drop 2drop 0 exit
; then r> if dnegate then -1
hdr 0,'(NUMBER?)'
pnumq: call docol ; convert counted string to double number
dw zero,zero
dw rot
dw dup,onep,cat
dw clit
db '-'
dw equal
dw dup,tor
dw subb
dw conv
dw dup,cat
dw clit
db '.' ; trailing '.' for double number (ANS)
dw equal
dw dup,nott
dw dpl,store
dw subb
dw cat,bl,subb
dw zbran,pnumq1
dw fromr,drop
dw tdrop,zero
dw exit
pnumq1: dw fromr
dw zbran,pnumq2
dw dnegat
pnumq2: dw true
dw exit
; NUMBER? ( c-addr u -- d -1 | 0 ) 31 min (sbuf) swap 2dup 1+ blank
; cmove (sbuf-1) (number?)
hdr 7,'NUMBER?' ; uses SBUF
numq: call docol
dw clit
db 31
dw min
dw lit,sbuf
dw swap
dw tdup ; add trailing blank
dw onep,blank
dw cmove
dw lit,sbuf-1
dw pnumq
dw exit
; HOLD ( char -- ) -1 hld +! hld @ c!
hdr 4,'HOLD'
hold: call docol
dw true
dw hld,pstor
dw hld,at
dw cstor
dw exit
; <# ( -- ) pad hld !
hdr 2,'<#'
bdigs: call docol
dw pad
dw hld,store
dw exit
; #> ( d -- c-addr u ) 2drop hld @ pad over -
hdr 2,'#>'
edigs: call docol
dw tdrop
dw hld,at
dw pad
dw over
dw subb
dw exit
; SIGN ( n -- ) 0< if [char] - hold then
hdr 4,'SIGN'
sign: call docol
dw zless
dw zbran,sign1
dw clit
db '-'
dw hold
sign1: dw exit
; # ( +d1 -- +d2 ) base @ >r 0 r@ um/mod r> swap >r um/mod
; r> rot 9 over < if 7 + then [char] 0 + hold
hdr 1,'#'
dig: call docol
dw base,at,tor
dw zero
dw rat,umslm
dw fromr
dw swap,tor
dw umslm
dw fromr
dw rot
dw clit
db 9
dw over,less
dw zbran,dig1
dw clit
db 7
dw plus
dig1: dw clit
db '0'
dw plus
dw hold
dw exit
; #S ( +d -- 0 0 ) begin # 2dup or 0= until
hdr 2,'#S'
digs: call docol
digs1: dw dig
dw tdup
dw orr,zequ
dw zbran,digs1
dw exit
; end